package cn.tedu.ivos.application.service.impl;

import cn.tedu.ivos.application.mapper.ApplicationMapper;
import cn.tedu.ivos.application.pojo.dto.ApplicationQuery;
import cn.tedu.ivos.application.pojo.dto.ApplicationSaveParam;
import cn.tedu.ivos.application.pojo.entity.Application;
import cn.tedu.ivos.application.pojo.vo.ApplicationVO;
import cn.tedu.ivos.application.service.ApplicationService;
import cn.tedu.ivos.audit.mapper.AuditMapper;
import cn.tedu.ivos.audit.pojo.vo.AuditVO;
import cn.tedu.ivos.audit.service.AuditService;
import cn.tedu.ivos.base.enums.ApplicationStatusEnum;
import cn.tedu.ivos.user.mapper.UserMapper;
import cn.tedu.ivos.user.pojo.vo.UserVO;
import cn.tedu.ivos.user.service.UserService;
import cn.tedu.ivos.vehicle.mapper.VehicleMapper;
import cn.tedu.ivos.vehicle.pojo.dto.VehicleQuery;
import cn.tedu.ivos.vehicle.pojo.entity.Vehicle;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.StringJoiner;

@Transactional
@Slf4j
@Service
public class ApplicationServiceImpl implements ApplicationService {
    @Autowired
    ApplicationMapper applicationMapper;
    @Autowired
    AuditService auditService;
    @Autowired
    UserMapper userMapper;
    @Autowired
    AuditMapper auditMapper;
    @Autowired
    VehicleMapper vehicleMapper;

    @Override
    public void save(ApplicationSaveParam applicationSaveParam) {
        log.debug("保存申请单业务:applicationSaveParam={}", applicationSaveParam);
        Application application = new Application();
        BeanUtils.copyProperties(applicationSaveParam, application);
        //新增申请单,初始状态为"已发起"
        application.setStatus(ApplicationStatusEnum.PENDING.getCode());
        application.setCreateTime(new Date());
        //将准备好的申请单数据存入申请表中
        /* 遇到的问题：新增申请单对应的审批单数据时，审批数据没有申请单id
         * 原因：id是一个很特殊的属性，无法通过其它字段进行select查询
         * 解决方案: 给此insert()对应的SQL上加配置 useGeneratedKeys="true" keyProperty="id"
         * 效果: JDBC会为当前的application对象自动生产自增主键,并把生成的主键值自动
         * 赋值给当前application对象的id属性*/
        applicationMapper.insert(application);

        //还需要调用审批业务层,为当前申请单同步新增对应的审批数据
        auditService.insertAudit(application);
    }

    @Override
    public List<ApplicationVO> selectApplication(ApplicationQuery applicationQuery) {
        log.debug("查询申请单业务:applicationQuery={}", applicationQuery);
        List<ApplicationVO> list = applicationMapper.selectApplication(applicationQuery);
        //遍历上方的申请单集合,为每一个申请单VO对象补充审批人数据
        for (int i = 0; i < list.size(); i++) {
            ApplicationVO applicationVO = list.get(i);
            //处理申请单VO,给当前的申请单VO补充审批人数据
            assignAuditUserList(applicationVO);
        }
        return list;
    }

    @Override
    public void cancel(Long id) {
        log.debug("撤销申请单业务:id={}",id);
        Application application = new Application();
        application.setId(id);
        application.setStatus(ApplicationStatusEnum.CANCEL.getCode());
        application.setUpdateTime(new Date());
        applicationMapper.update(application);

        //除此之外,还需要删除此申请单对应的审批单
        auditMapper.deleteByApplicationId(id);
    }

    private void assignAuditUserList(ApplicationVO applicationVO) {
        //1.准备空集合,分别用来保存此申请单对应的审批人姓名与id集合
        List<String> auditUsernameList = new ArrayList<>();
        List<Long> auditUserIdList = new ArrayList<>();
        //2.根据传入的申请单对象,查出对应的审批单
        List<AuditVO> auditVOList =
                auditService.selectAuditByApplicationId(applicationVO.getId());
        //3.遍历依据申请单id查出来的审批单集合
        for (int i = 0; i < auditVOList.size(); i++) {
            AuditVO auditVO = auditVOList.get(i);
            //4.取出当前审批单中的审批人id,并存入上方的空集合中
            Long id = auditVO.getAuditUserId();
            auditUserIdList.add(id);
            //5.根据刚刚取出来的审批人id,查出此人的姓名,并存入上方的姓名空集合中
            UserVO userVO = userMapper.selectById(id);
            auditUsernameList.add(userVO.getUsername());
        }
        //6.准备一个拼接工具,帮我们将所有审批人姓名连接成一个字符串
        StringJoiner stringJoiner = new StringJoiner(",");
        for(String username : auditUsernameList){
            stringJoiner.add(username);
        }
        //将拼接好的审批人姓名字符串赋值给申请单VO的AuditUsernameList属性
        applicationVO.setAuditUsernameList(stringJoiner.toString());
        //将准备好的审批人id集合赋值给申请单VO的AuditUserIdList属性
        applicationVO.setAuditUserIdList(auditUserIdList);
    }

    @Override
    public void distribute(Long applicationId, Long vehicleId) {
        // 1.准备一个空对象,用来封装需要修改的申请单数据
        Application application = new Application();
        application.setId(applicationId);
        // 设置状态为60
        application.setStatus(ApplicationStatusEnum.ALLOCATION.getCode());
        application.setVehicleId(vehicleId);
        applicationMapper.update(application);

        // 2.修改申请单表中的vehicle_id字段
        Vehicle vehicle = new Vehicle();
        vehicle.setId(vehicleId);
        vehicle.setStatus("0");
        vehicleMapper.update(vehicle);

    }

    @Override
    public void back(Long applicationId, Long vehicleId) {
        log.debug("申请单退回业务:applicationId={},vehicleId={}", applicationId, vehicleId);
        Application application = new Application();
        application.setId(applicationId);
        application.setUpdateTime(new Date());
        application.setVehicleId(null);
        application.setStatus(ApplicationStatusEnum.END.getCode());

        applicationMapper.update(application);

        Vehicle vehicle = new Vehicle();
        vehicle.setId(vehicleId);
        vehicle.setStatus("1");
        vehicle.setUpdateTime(new Date());
        vehicleMapper.update(vehicle);
    }
}